Rolls for rolling girder-rails



(No Model.)

A. J. MOXHAM.

ROLLS FOR ROLLING GIRDER RAILS.

atented Apr. 27, 1886.

fink/7Z6] UNITE STATES PATENT OFFICE.

ARTHUR J. MOXHAM, OF JOI-INSTOXVN, PENNSYLVANIA.

ROLLS FOR ROLLING GlRDER-RAILS.

FJPECIFIQATION forming part of Letters Patent No. 340,891, dated April 27, 1886.

Application filed February 13, 1886. Serial No.191,879. (N0 model.)

finished shapes of side-bearing rails in thesame set of rollstl1at is, without changing the rolls for the production of either finished shape.

The invention will first be described as illustrated in the accompanying drawing, and then particularly set forth in the claims.

In the accompanying drawing is illustrated a set of rolls threehigh, but they maybe two-high, if preferred, containing seven passes, numbered in their respective order, as shown, certain parts of each of said passes being designated by letters, as hereinafter described. Pass No. 4. is an edging pass, passes Nos. 1 2 3 5 flattening passes, and passes Nos. 6 and 7 finishing passes.

The billet may be first reduced to shape suitable to enter pass No. 1 by rolling down in any ordinary or well-known grooves. The section-lined space in the several passes shows like a templet the shape of the metal when leaving each individual pass.

The hot billet-,having been first rolled through pass No. 1, is then successively rolled through all the remaining passes (turned upon edge when put through pass No. 4) when it is desired to have a rail of cross-section indicated by the shape of pass No. 7; but if a rail be desired of a cross-section having the shape indicated by pass No. 6 the rolling is stopped after putting the metal through said pass.

The operation of the several passes in effecting the desired changes in shape of the metal 7 in the course of its rolling is as follows: In the the distortion which such excess of draft tends to effect, to such an extent that the guides used for leading the metal into and from the passes can prevent or overcome the small amount of distortion remaining in the metal as it leaves said passes. In the edging pass, N0. 4, the amount of draft put upon the parts 6 and e is small, the excess of draft being put on the point I) to reduce the same in thickness and increase it in depth, the draft acting vertically through a d, and ample room for space of metal being provided at said point b. By the difference in draft proportioned herein the greatest changein the reduction of thickness and increase of depth of web that is possible is effected, for only enough draft is put upon the rest of the mass of metal to permit of sufficient flow of metal to prevent buckling. Said amount of draft is at the same time, however, sufficient at these points to effect the desired change of form in the parts 6 and e to suit them to enter the remaining passes. In passes Nos. 5 and 6 the part (I is groovedout below the part c,'which in pass N o. 6 results in a form of rail much used, wherein the side tram is provided with a lip or upturned edge, 0. Pass N 0. 6 thus becomes, if desired, the finishing pass. In pass No. 7 the-upturned flange or ridge cis rolled down and the rail is discharged out of said pass with a flat side tram, as shown by the shape of said pass.

I do not limit myself to the upturned flange shown in passes Nos. 5 and 6, for if it is not desired to roll both forms of rail in one set of rolls said passes can each be provided with a flush face, and thus the upturned flange c be entirely omitted from the rolling operation.

Such change is, however, so small in its relation to the proportions of the remaining parts of said passes that those skilled in the art can readily make such change without otherwise departing from the forms of said passes herein described; nor do I limit myself to but one edging pass-such as pass No. 4as the desired change of form therein effected may be effected in two of such passes instead of but in one. This course would be advisable and preferable if only one of the two shapes of rails shown in passes Nos. 6 and 7 were desired to be rolled in the same set of rolls, as by such repetition of edge-rolling one of the flattening passes could Le dispensed with, if I passes, as indicated in the accompanying drawdesired.

Having thus fully described my said improvement in rolls for rolling sidebearing gi rd- 5 errai1s, as of my invention I claim-- 1. A set of rolls for rolling metal rails, provided with passes, substantially as hereinbefore described, having the conformations indicated in the accompanying drawing by the IO numbers from 1 to 7, inclusive, substantially as and for the purposes set lorth.

2. A set of rolls provided with finishing 111g by the Nos. 6 and 7, one or both, and with one or more edging passes, as indicated in the accompanying drawing by the No. 4, and with flattening passes having the conformations substantially as described, and indicated in said drawing, substantially as and for the pun poses set forth.

ARTHUR J. MOXHAM. Witnesses:

J OHN TULLY, FRANCIS P. REILLY. 

